DWU Water And Wastewater Procedures And Design Manual
APPENDIX F
General Notes for
Typical Water/Wastewater Main Capital Improvement Project
General Notes October, 2013
DWU Water And Wastewater Procedures And Design Manual
PROJECT CONTACTS:
DWU Project Manager:
GENERAL
1. All work shall be done in accordance with the North Central Texas Council of Governments (NCTCOG) Standard Specifications for Public Works Construction (Applicable Edition) and City of Dallas Addendum (Latest Edition) to these specifications.
2. Reference to standard drawings shall mean those shown in the DWU Standard Drawings for Water & Wastewater Construction (Latest Edition).
3. All items of work required to complete the work as shown or implied by the plans and as specified in the contract documents which are not listed as a pay item in the proposal, shall be considered subsidiary.
- The location, elevation, and size of existing utilities shown on the plans as obtained from the City of Dallas and utility company records, are considered approximate. The engineer does not certify that all utilities are shown. The Contractor shall verify exact locations, sizes, and depths ofexisting utilities before beginning construction (including ordering of pre-cast manholesand concrete pipe if applicable). NO SEPARATE PAY ITEM
5.The Contractor shall contact Texas Excavation Safety System (800-DIG-TESS: 800-344-8377) and other utility companies 48 hours prior to locating existing utilities and or construction activities. NO SEPARATE PAY ITEM
6. The Contractor shall preserve, protect and support all existing utilities at all times during construction. Any damage to utilities resulting from the contractor's operation shall be restored at his expense. NO SEPARATE PAY ITEM
7.Power poles may have to be braced at the Contractor’s expense.
8. No machinery, construction access or storage shall be allowed on park property beyond the limits of the temporary workspace as defined by the City of Dallas Inspector.
General Notes F-1 October, 2013
DWU Water And Wastewater Procedures And Design Manual
TRAFFIC CONTROL
1. The Contractor shall develop a traffic control plan in accordance with the City Of Dallas Traffic Barricade Manual, Latest Edition and the TXDOT Texas Manual on Uniform Traffic Control Devices (TMUTCD), latest version, if necessary. NO SEPARATE PAY ITEM
2. The diversion of pedestrians and vehicles during the progress of the work shall be in a manner satisfactory to the City of Dallas Inspector. NO SEPARATE PAY ITEM
3. The Contractor shall coordinate all traffic variances with City of Dallas Traffic Safety Coordinators at XXX-XXX-XXXX.
4. Two-way traffic shall be maintained at all times and flagmen should be used to maintain two-way traffic as necessary.
5. All barricades, warning signs and traffic control devices shall conform to the City Of Dallas standards. NO SEPARATE PAY ITEM
6. When closing side streets, two working days notification is required for Fire, Police, Streets and Sanitation Departments. Please contact XXX at XXX-XXX-XXXX to notify of traffic restrictions.
7. Contractor shall maintain access to private driveways at all times during construction.
NO SEPARATE PAY ITEM
8Vehicular ingress and egress (entrance and exit) to a business property shall be maintained at all time. If not, specific signs along with business name and direction arrow(s) shall be used for any temporary access locations. Additional signs may be necessary if there is a detour. NO SEPARATE PAY ITEM
- The Contractor shall replace any pavement markings and signs that are removed or damaged during construction. NO SEPARATE PAY ITEM
General Notes F-2 October, 2013
DWU Water And Wastewater Procedures And Design Manual
PAVEMENT REPLACEMENT
1. Saw cut, remove and replace pavements, sidewalks, curbs and gutters to conform with City of Dallas Public Works, Pavement Cuts and Repair Standards Manual, Latest edition.
2. All disturbed pavement markings including, but not limited to, striping, traffic buttons, crosswalks shall be restored to same or improved condition as per City of Dallas Specifications for Public Works Construction, Standard Construction Details and all Addenda Thereto. NO SEPARATE PAY ITEM
TREES AND LANDSCAPING
- The Contractor shall not damage or remove any trees or landscaping unless otherwise authorized by the City of Dallas Inspector. Any trees or landscaping that are damaged or removed during the construction shall be replaced by the contractor at his expense.
WATER MAIN AND APPURTENANCES:
1. All 6", 8" and 12” water mains shall be PVC C900 (DR-14) water pipe, with Class "C+" embedment, except as noted.
2.All water mains with no profiles shall have a minimum cover of four (4) feet below street grade in an improved street and six (6) feet of cover in an unimproved street or alley.
3. Compact fittings are not authorized for this project. All ductile iron pipe, fittings and fire hydrant bases shall be encased with polyethylene wrap.
4. All bends, tees, fire hydrants and plugs are to be restrained type fittings and to be blocked with Class "B" Concrete as per DWU Standard Drawing No. 229-234, in addition to restrained joints.
5. If required by the City of Dallas Inspector, the Contractor shall install temporary water lines on both sides of the street until the new water main has been completed, tested, approved, and accepted by DWU. NO SEPARATE PAY ITEM
6. If no temporary mains are required by the City of Dallas Inspector, then the existing water mains are to be in service with the fire hydrants until the new water main has been tested, approved and accepted by DWU. NO SEPARATE PAY ITEM
7. The contractor will ensure that fire hydrants are accessible to fire trucks at all times. NO SEPARATE PAY ITEM
8. The Contractor shall sequence his construction such that no more than one fire hydrant is out of service at any given time.
General Notes F-3 October, 2013
DWU Water And Wastewater Procedures And Design Manual
9.All fire hydrants shall be installed as per DWU Standard Drawing No. 224. Existing fire hydrants on killed water lines are to be removed and delivered to DWU Distribution Division at XXX XX,Dallas, Texas, if required by City of Dallas Inspector; otherwise they become the property of the contractor.
10. Backfill made on break repairs to existing water mains may have been made with crushed rock. This could present a cave-in danger to a new ditch; therefore, precautions should be taken by the contractor. NO SEPARATE PAY ITEM.
11.Abandon all water valves on existing mains being killed as per DWU Standard Drawing No. 219. NO SEPARATE PAY ITEM.
12. The Contractor shall coordinate all water main ties-ins with City of Dallas Inspector.
13. The Contractor shall verify the location and number of all existing active water services and construct new services up to the meter prior to killing existing main.
14. Water services greater than 30 feet shall be minimumof 1 inch in diameter.
WASTEWATER MAIN AND APPURTENANCES:
1. The Contractor shall maintain existing wastewater flow at all times. NO SEPARATE PAY ITEM.
2.Abandon all manholes on abandoned wastewater mains.
3. The Contractor shall verify the location of all the wastewater laterals and construct new laterals from the wastewater main to the property line with cleanouts and reconnect to the existing laterals. Dye testing may be required at no additional cost to the owner.
3.Prior to reconnection of wastewater laterals, the Contractor shall verify whether the
existing lateral is active or inactive. The Contractor is required, as a minimum, to
include T.V. survey & perform dye testing. All laterals determined to be inactive shall
not be reconnected. The City of Dallas Inspector shall approve all laterals
targeted for reconnection. NO SEPARATE PAY ITEM
- The backfill around manholes located in existing or new pavement shall be flowable backfill as per Specifications. NO SEPARATE PAY ITEM
5.The removal of existing manholes, wastewater access devices and cleanouts is considered incidental unless noted otherwise.
General Notes F-4 October, 2013